Shuttle-box tension-controlling mechanism for looms



Jan. 27. 1925-. r 1,524,103

; J. NORTHROP I SHUTTLE BOX 'rnnsxou couwnomgus MECHANISM FOR LOOMSFiled Oct. 10 1922 Patented .len. 27, 1%255.

JONAS NOR'IHROP. OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO HOPEDALE MANU-FACTURING COMPANY, OF MILFORD. MASSACHUSETTS,

CHUSETTS.

A CORPORATION OF MASSA- i SHUTTLE-BOX TENSION-CONTROLLING MECHANISM FORLOOIVIS.

Application filed Cc'tober 10, 1922. Serial No. 593,553.

130 it known that i, Jonas Nonrnnor, a citizen of the United States,residing at llopcdalc. in the county of orcester and State oiMassachusetts, have invented certain new and useful Improvements inShuttle-l ox 'llension-(ontrolling Mechanism for Looms; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The present inventi m relates to an improvement in shuttle box tensioncontrolling mechanism for looms.

The object of the inventitm is to produce a construction for varying theresistance ottercd by the shuttle box to the entrance of the shuttlewith the position of the lay. To this end the invention consists in themechanism hereinafter described and particularly defined in the claims.

in the accompanying drawings illustrating the preferred form of theinvent on, Fig. 1 is a sectional elevation of the lay. breast beam andassociated parts of a loom illustrating the construction; and Fig. 2 isa perspective view of a number of the parts together constituting aspring bracket, its supporting and securing means.

The illustrated embodiment oi' the invention is described as follows:The loom frame 1. the lay 2, the sword l, and the other oooperatingparts of a loom, may be oonstrut-ted in any usual or preferred,form. Thelay is provided on its under side with the dagger shalt t to which aresecured the bindcr tingers 5. each carrying a binder presser Gadjustably secured to the binder lingers. 'lhe dagger shaft 1 isprovided with daggers 7 adapted to engage the frog in the usual manner.and it is also provided with a spring arm 8 which is rigidly secured tothe. dagger shaft. 4. The forward end of the spring arm 8 is provldedwith a hook 9 to which one end of the. dagger shaft spring '10. issecured. The other end of the spring is hooked onto the spring hook onthe bracket 11 which is seemed to the frame of the loom and adapted tobe adjusted. to various positions in order to vary the amount oi tensionto which the spring is :tcd, and in turn the amount of the tension onthe binders, and therefore the tension on the shuttle as it enters theshuttle box. The bracket 11 slotted at 12 to receive the-bolt 13. Thebracket 11 is received in a slot 1t in the washer 15, provided on itsunder surface with a series of radial grooves 16. This washer 15 issupported against a second washer li' which has two teeth 19 adapted toenter the radial grooves 16 in the under surface of the washer 15. Thewasher 17 is provided with a. square hole 20. The bracket 11 is boltedto an ear 21 formed on the frame of the 100m, which car is providedwitha slot 22 adapted'to receive the squared portion of the bolt 13. Thecar 21 thereby holds the bolt 13 from rotating movement and the boltholds the washer 17 from similar movement. The projections on the latterhold the washer 15 from rotating movement. On the'end of the bolt isreceived the washer 23 and nut 24. The bracket 11 may be moved to anydesired position with' h the limits of the slot 12 and to any angularposition by loosening the nut 24: on the bolt 13, and

turning the bracket 11 so as to turn the washer 16 to the desiredposition. The

bracket may be secured in a wide variety of positions of adjustment withrelation to the lay so as thereby to vary the amount of force exerted bythe spring on the spring arms 8 and the rate at which such pressureshall be varied. Thus with the spring hook of the bracket 11 in arearward position, the time of application o the spring pressure to thespring arms on the dagger shaft will be later than otherwise. 1

The mode of operation of the mechanism is as follows: Starting with thelay in the position shown in dotted lines in Fig. 1. the binders,through the means described, exert a minimum pressure on the shuttle.This pressure is increased as the. lay beats back to the back centerwhere. it reaches a maximum, and it then decreases as the lay beatsforward again. By positioning the bracket in various ways it will beobserved that a number of ditterent results may be se cured with respectto the friction exerted on the shuttle by the binders. For example.

the tension on the shuttle may be made to decrease fronrthe front centeras the lay moves rearwardly for a certain distance. thereby ati'ordmg areduction of friction on the shuttletor picking purposes. The pres.

arm secured to the dag sure may then increase to the back center,

affording a maximum pressure at that point which. is practically theearliest point at which the shuttle may reach the shuttle box into whichit is being thrown, and from such point the pressure on the shuttle maydcc'rease as the lay moves forward, so that a tardily arriving shuttle.may be subiected to a lesser resistance in the receiving shuttle box.Many other arrangements and variations of the friction resistance of theshuttle may be secured by this construction.

The present invention is not broadly claimed herein, as itforms thesubject of the application of Clare H. Draper filed July 11, 1922,Serial No. 574,212, to which, by permission, reference may be had.

Having thus described the invention, what is claimed is:

1. Shuttle box tension controlling mechanism for looms having, incombination, a lay, shuttle boxes provided with binders, binder fingersfor acting on the binders, a dagger shaft carrying the binder fingers, aspring 'ger shaft, and a spring attached at one end to the end of thespring arm and at the other end to a sta-" tionary part of the loom.

Shuttle box tension controlling inechanism for looms having, incombination, a lay, shuttle boxes carried by the lay provided withbinders, a spring arm, conucctions between the spring arm and thebinders for causing pressure to be exerted on the binders, a springconnected with a spring arm and to a statitmary part of the loom forcausing, spring pressure to be exerted on the binder, the point oiattachment of the spring to the stationary partoii the loom beinglocated at a distance from the 1 axis of motion of the lay, so thatvariable pressures will be exerted by the spring on the binder duringthe operation of the loom in accordance with the time of reception ofthe shuttle in a box,

Shuttle box tension controlliing mechanism for looms having, incombimition, a lay, a shuttle box carried by the lay, a frictioncmitrivunce for increasing and decreasing the resistance of the shuttlebox to the entrance of the shuttle thereto, and means for applying suchfrictional pressure to the shuttle having provision for adjustment so asto reduce the pressure on the shuttle during the picking, to increase itto a maximum at a time when the shuttle may first arrive at the shuttlebox into which it is thrown, and to thereafter decrease it so that theshuttle may be received in the shuttle box with less and less resistanceafter the lay passes the back center.

JONAS NORTHROP.

